package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request  设置session，方便获取当前登录用户
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        //1. md5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2. 根据username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3. 如果没有查到则返回失败结果
        if (emp == null) {
            return R.error("登陆失败");
        }

        //4. 密码比对，如果不对同3
        if (!emp.getPassword().equals(password)) {
            return R.error("登陆失败");
        }

        //5. 查看员工状态，如果为已禁用状态，则返回已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }

        //6. 登陆成功，将员工id存入Session并返回登陆成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     *
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存的当前登陆员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     *
     * @param employee 员工信息
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息：{}", employee.toString());

        //设置初始密码123456，需要进行MD5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        //设置创建时间和最后更新时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //获取当前登录用户id
        //Long empId = (Long) request.getSession().getAttribute("employee");

        //设置创建人id和最后更新人id
        //employee.setCreateUser(empId);
        //employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     *
     * @param page     页数
     * @param pageSize 每页条目数
     * @param name     搜索员工信息，如果没有则为查询全部数据
     * @return MP提供的Page对象，包含查询到的所有数据和总条目数
     */
    @GetMapping("/page")
    public R<Page<Employee>> page(int page, int pageSize, String name) {
        log.info("page {},pageSize = {}，name = {}", page, pageSize, name);

        //构造分页构造器
        Page<Employee> pageInfo = new Page<>(page, pageSize);

        //构建条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();

        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);

        //添加排序条件，根据最后修改时间
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     *
     * @param employee 员工信息
     * @return 修改结果
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info(employee.toString());

        //long id = Thread.currentThread().getId();
        //log.info("线程id为：{}",id);

        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(empId);
        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id 员工id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到");
    }
}
